Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines
Abstract
:1. Introduction
2. Mathematical Modeling
2.1. Geometrical Modeling
2.2. Governing Equation
2.3. Lubrication Condition
2.4. Thermal Effect of Lubricant
2.5. Frictional Characteristics
3. Numerical Procedure
4. Results and Discussion
4.1. Validation of Model
4.2. Effect of Liner Deformation
4.3. Effect of Liner Temperature
5. Conclusions
- Liner deformation and temperature affect the frictional characteristics of the groove textured RLC significantly. Compared with the groove textured RLC with ideal circular liner, the groove textured RLC with deformed liner had low friction dissipation and power dissipation. Furthermore, the friction dissipation and power dissipation of the groove textured RLC decreased with the increase of the liner temperature.
- The grooves on the ring can effectively reduce the hydrodynamic friction force, power dissipation, and friction dissipation, and the reductions of average power dissipation and friction dissipation had a close relation to the liner deformation and temperature. In detail, for the groove textured RLC, the reduction percentages of the average power dissipation and friction dissipation increased with the decreases of the maximum liner deformation and liner temperature. However, when the groove textured RLC was under the mixed regime of lubrication, the grooves on the ring increased the boundary friction force.
Author Contributions
Funding
Conflicts of Interest
References
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Parameter | Value | Unit |
---|---|---|
Stroke length, ls | 90 | mm |
Axial width of ring, b | 1 | mm |
Thickness of ring, ar | 3.5 | mm |
Nominal radius of liner, r | 42 | mm |
Young’s modulus of ring, E1 | 250 | GPa |
Young’s modulus of liner, E2 | 120 | GPa |
Poisson’s ratio of ring, τ1 | 0.3 | - |
Poisson’s ratio of liner, τ2 | 0.3 | - |
Surface roughness of ring, σ1 | 0.42 | μm |
Surface roughness of liner, σ2 | 0.48 | μm |
Parameters | Value | Unit |
---|---|---|
correlation factor, α0 | 0.06782 | mPa·s |
correlation factor, α1 | 880.29 | °C |
correlation factor, α2 | 103.08 | °C |
Reference density of lubricant at 40 °C, | 771.02 | kg·m−3 |
Reference viscosity of lubricant at 40 °C, μ0 | 31.87 | mPa·s |
Maximum Deformation of Liner, Δc | Reduction Percentage | |||
---|---|---|---|---|
Intake Stroke | Compression Stroke | Power Stroke | Exhaust Stroke | |
0 μm | 9.41% | 8.72% | 10.99% | 8.54% |
10 μm | 9.45% | 8.82% | 11.06% | 8.80% |
20 μm | 9.18% | 8.47% | 10.20% | 8.67% |
30 μm | 9.11% | 8.27% | 9.15% | 8.64% |
Liner Temperature, Tliner | FMEP Value | Reduce Percentage | |
---|---|---|---|
Textured Ring | Untextured Ring | ||
60 °C | 21.25 | 23.45 | 9.38% |
80 °C | 16.77 | 18.36 | 8.66% |
100 °C | 13.42 | 14.52 | 7.58% |
120 °C | 11.09 | 11.71 | 5.29% |
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Liu, C.; Lu, Y.; Zhang, Y.; Tang, L.; Guo, C.; Müller, N. Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines. Energies 2019, 12, 2761. https://doi.org/10.3390/en12142761
Liu C, Lu Y, Zhang Y, Tang L, Guo C, Müller N. Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines. Energies. 2019; 12(14):2761. https://doi.org/10.3390/en12142761
Chicago/Turabian StyleLiu, Cheng, Yanjun Lu, Yongfang Zhang, Lujia Tang, Cheng Guo, and Norbert Müller. 2019. "Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines" Energies 12, no. 14: 2761. https://doi.org/10.3390/en12142761
APA StyleLiu, C., Lu, Y., Zhang, Y., Tang, L., Guo, C., & Müller, N. (2019). Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines. Energies, 12(14), 2761. https://doi.org/10.3390/en12142761